What? Can you take a picture of the question please?
Answer:
A
Explanation:
When you multiply a vector by a scalar the magnitude will change but the direction will not change.
The solute would then sink to the bottom and would not dissolve
Velocity<span> is the change in the position of an object, divided by the time. </span>Velocity<span> has a magnitude (a value) and a direction. The unit for </span>velocity<span> is meters per second (m/s).</span>
The answer is: 720W
The definition of Power is:P =L/t =→F⋅→s/t =→F⋅→s/t = →F⋅→v
The ⋅ in the last formulation designate a scalar product, well-defined by:
→v . →w = |v| |w| cos(ˆvw), the angle ˆvw is 0 because →F and →v are parallel, so the cosinus is 1.
So: P=1800N⋅ 0,40m/s=720W.